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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/factory.h" | 5 #include "src/factory.h" |
6 | 6 |
7 #include "src/allocation-site-scopes.h" | 7 #include "src/allocation-site-scopes.h" |
8 #include "src/base/bits.h" | 8 #include "src/base/bits.h" |
9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
10 #include "src/conversions.h" | 10 #include "src/conversions.h" |
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1819 #undef TYPED_ARRAY_CASE | 1819 #undef TYPED_ARRAY_CASE |
1820 } | 1820 } |
1821 | 1821 |
1822 | 1822 |
1823 size_t GetExternalArrayElementSize(ExternalArrayType type) { | 1823 size_t GetExternalArrayElementSize(ExternalArrayType type) { |
1824 switch (type) { | 1824 switch (type) { |
1825 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ | 1825 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ |
1826 case kExternal##Type##Array: \ | 1826 case kExternal##Type##Array: \ |
1827 return size; | 1827 return size; |
1828 TYPED_ARRAYS(TYPED_ARRAY_CASE) | 1828 TYPED_ARRAYS(TYPED_ARRAY_CASE) |
1829 default: | |
1830 UNREACHABLE(); | |
1831 return 0; | |
1832 } | 1829 } |
| 1830 UNREACHABLE(); |
| 1831 return 0; |
1833 #undef TYPED_ARRAY_CASE | 1832 #undef TYPED_ARRAY_CASE |
1834 } | 1833 } |
1835 | 1834 |
1836 | |
1837 size_t GetFixedTypedArraysElementSize(ElementsKind kind) { | |
1838 switch (kind) { | |
1839 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ | |
1840 case TYPE##_ELEMENTS: \ | |
1841 return size; | |
1842 TYPED_ARRAYS(TYPED_ARRAY_CASE) | |
1843 default: | |
1844 UNREACHABLE(); | |
1845 return 0; | |
1846 } | |
1847 #undef TYPED_ARRAY_CASE | |
1848 } | |
1849 | |
1850 | |
1851 ExternalArrayType GetArrayTypeFromElementsKind(ElementsKind kind) { | |
1852 switch (kind) { | |
1853 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ | |
1854 case TYPE##_ELEMENTS: \ | |
1855 return kExternal##Type##Array; | |
1856 TYPED_ARRAYS(TYPED_ARRAY_CASE) | |
1857 default: | |
1858 UNREACHABLE(); | |
1859 return kExternalInt8Array; | |
1860 } | |
1861 #undef TYPED_ARRAY_CASE | |
1862 } | |
1863 | |
1864 | 1835 |
1865 JSFunction* GetTypedArrayFun(ExternalArrayType type, Isolate* isolate) { | 1836 JSFunction* GetTypedArrayFun(ExternalArrayType type, Isolate* isolate) { |
1866 Context* native_context = isolate->context()->native_context(); | 1837 Context* native_context = isolate->context()->native_context(); |
1867 switch (type) { | 1838 switch (type) { |
1868 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ | 1839 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ |
1869 case kExternal##Type##Array: \ | 1840 case kExternal##Type##Array: \ |
1870 return native_context->type##_array_fun(); | 1841 return native_context->type##_array_fun(); |
1871 | 1842 |
1872 TYPED_ARRAYS(TYPED_ARRAY_FUN) | 1843 TYPED_ARRAYS(TYPED_ARRAY_FUN) |
1873 #undef TYPED_ARRAY_FUN | 1844 #undef TYPED_ARRAY_FUN |
1874 | |
1875 default: | |
1876 UNREACHABLE(); | |
1877 return NULL; | |
1878 } | |
1879 } | |
1880 | |
1881 | |
1882 JSFunction* GetTypedArrayFun(ElementsKind elements_kind, Isolate* isolate) { | |
1883 Context* native_context = isolate->context()->native_context(); | |
1884 switch (elements_kind) { | |
1885 #define TYPED_ARRAY_FUN(Type, type, TYPE, ctype, size) \ | |
1886 case TYPE##_ELEMENTS: \ | |
1887 return native_context->type##_array_fun(); | |
1888 | |
1889 TYPED_ARRAYS(TYPED_ARRAY_FUN) | |
1890 #undef TYPED_ARRAY_FUN | |
1891 | 1845 |
1892 default: | 1846 default: |
1893 UNREACHABLE(); | 1847 UNREACHABLE(); |
1894 return NULL; | 1848 return NULL; |
1895 } | 1849 } |
1896 } | 1850 } |
1897 | 1851 |
1898 | 1852 |
1899 void SetupArrayBufferView(i::Isolate* isolate, | 1853 void SetupArrayBufferView(i::Isolate* isolate, |
1900 i::Handle<i::JSArrayBufferView> obj, | 1854 i::Handle<i::JSArrayBufferView> obj, |
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1930 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type) { | 1884 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type) { |
1931 Handle<JSFunction> typed_array_fun_handle(GetTypedArrayFun(type, isolate())); | 1885 Handle<JSFunction> typed_array_fun_handle(GetTypedArrayFun(type, isolate())); |
1932 | 1886 |
1933 CALL_HEAP_FUNCTION( | 1887 CALL_HEAP_FUNCTION( |
1934 isolate(), | 1888 isolate(), |
1935 isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), | 1889 isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), |
1936 JSTypedArray); | 1890 JSTypedArray); |
1937 } | 1891 } |
1938 | 1892 |
1939 | 1893 |
1940 Handle<JSTypedArray> Factory::NewJSTypedArray(ElementsKind elements_kind) { | |
1941 Handle<JSFunction> typed_array_fun_handle( | |
1942 GetTypedArrayFun(elements_kind, isolate())); | |
1943 | |
1944 CALL_HEAP_FUNCTION( | |
1945 isolate(), isolate()->heap()->AllocateJSObject(*typed_array_fun_handle), | |
1946 JSTypedArray); | |
1947 } | |
1948 | |
1949 | |
1950 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type, | 1894 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type, |
1951 Handle<JSArrayBuffer> buffer, | 1895 Handle<JSArrayBuffer> buffer, |
1952 size_t byte_offset, | 1896 size_t byte_offset, |
1953 size_t length) { | 1897 size_t length) { |
1954 Handle<JSTypedArray> obj = NewJSTypedArray(type); | 1898 Handle<JSTypedArray> obj = NewJSTypedArray(type); |
1955 | 1899 |
1956 size_t element_size = GetExternalArrayElementSize(type); | 1900 size_t element_size = GetExternalArrayElementSize(type); |
1957 ElementsKind elements_kind = GetExternalArrayElementsKind(type); | 1901 ElementsKind elements_kind = GetExternalArrayElementsKind(type); |
1958 | 1902 |
1959 CHECK(byte_offset % element_size == 0); | 1903 CHECK(byte_offset % element_size == 0); |
1960 | 1904 |
1961 CHECK(length <= (std::numeric_limits<size_t>::max() / element_size)); | 1905 CHECK(length <= (std::numeric_limits<size_t>::max() / element_size)); |
1962 CHECK(length <= static_cast<size_t>(Smi::kMaxValue)); | 1906 CHECK(length <= static_cast<size_t>(Smi::kMaxValue)); |
1963 size_t byte_length = length * element_size; | 1907 size_t byte_length = length * element_size; |
1964 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); | 1908 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); |
1965 | 1909 |
1966 Handle<Object> length_object = NewNumberFromSize(length); | 1910 Handle<Object> length_object = NewNumberFromSize(length); |
1967 obj->set_length(*length_object); | 1911 obj->set_length(*length_object); |
1968 | 1912 |
1969 Handle<ExternalArray> elements = NewExternalArray( | 1913 Handle<ExternalArray> elements = NewExternalArray( |
1970 static_cast<int>(length), type, | 1914 static_cast<int>(length), type, |
1971 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); | 1915 static_cast<uint8_t*>(buffer->backing_store()) + byte_offset); |
1972 Handle<Map> map = JSObject::GetElementsTransitionMap(obj, elements_kind); | 1916 Handle<Map> map = JSObject::GetElementsTransitionMap(obj, elements_kind); |
1973 JSObject::SetMapAndElements(obj, map, elements); | 1917 JSObject::SetMapAndElements(obj, map, elements); |
1974 return obj; | 1918 return obj; |
1975 } | 1919 } |
1976 | 1920 |
1977 | |
1978 Handle<JSTypedArray> Factory::NewJSTypedArray(ElementsKind elements_kind, | |
1979 size_t number_of_elements) { | |
1980 Handle<JSTypedArray> obj = NewJSTypedArray(elements_kind); | |
1981 | |
1982 size_t element_size = GetFixedTypedArraysElementSize(elements_kind); | |
1983 ExternalArrayType array_type = GetArrayTypeFromElementsKind(elements_kind); | |
1984 | |
1985 CHECK(number_of_elements <= | |
1986 (std::numeric_limits<size_t>::max() / element_size)); | |
1987 CHECK(number_of_elements <= static_cast<size_t>(Smi::kMaxValue)); | |
1988 size_t byte_length = number_of_elements * element_size; | |
1989 | |
1990 obj->set_byte_offset(Smi::FromInt(0)); | |
1991 i::Handle<i::Object> byte_length_object = | |
1992 isolate()->factory()->NewNumberFromSize(byte_length); | |
1993 obj->set_byte_length(*byte_length_object); | |
1994 Handle<Object> length_object = NewNumberFromSize(number_of_elements); | |
1995 obj->set_length(*length_object); | |
1996 | |
1997 obj->set_buffer(Smi::FromInt(0)); | |
1998 obj->set_weak_next(isolate()->heap()->undefined_value()); | |
1999 Handle<FixedTypedArrayBase> elements = | |
2000 isolate()->factory()->NewFixedTypedArray( | |
2001 static_cast<int>(number_of_elements), array_type); | |
2002 obj->set_elements(*elements); | |
2003 return obj; | |
2004 } | |
2005 | |
2006 | 1921 |
2007 Handle<JSDataView> Factory::NewJSDataView(Handle<JSArrayBuffer> buffer, | 1922 Handle<JSDataView> Factory::NewJSDataView(Handle<JSArrayBuffer> buffer, |
2008 size_t byte_offset, | 1923 size_t byte_offset, |
2009 size_t byte_length) { | 1924 size_t byte_length) { |
2010 Handle<JSDataView> obj = NewJSDataView(); | 1925 Handle<JSDataView> obj = NewJSDataView(); |
2011 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); | 1926 SetupArrayBufferView(isolate(), obj, buffer, byte_offset, byte_length); |
2012 return obj; | 1927 return obj; |
2013 } | 1928 } |
2014 | 1929 |
2015 | 1930 |
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2483 return Handle<Object>::null(); | 2398 return Handle<Object>::null(); |
2484 } | 2399 } |
2485 | 2400 |
2486 | 2401 |
2487 Handle<Object> Factory::ToBoolean(bool value) { | 2402 Handle<Object> Factory::ToBoolean(bool value) { |
2488 return value ? true_value() : false_value(); | 2403 return value ? true_value() : false_value(); |
2489 } | 2404 } |
2490 | 2405 |
2491 | 2406 |
2492 } } // namespace v8::internal | 2407 } } // namespace v8::internal |
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